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(a) avector x bvector

(b) avector ·bvector

(c) (avector + bvector ) · bvector

(d) the component of avector along the direction of bvector

these are the answers i got

a)8.5k

b) 29.5

c) 58.5

d)16.2

i know that a through c are correct but d is incorrect, i calculated d by

cos-1 (29.5/(5.7*5.39) = 16.2

the 5.7 came from sqrt(3.5²+4.5²)

5.39 came from sqrt(2²+5²)

thanks in advance